It's often not desirable to expose your Drupal server directly to
the end users. This document describes how to “hide” a Drupal
server behind a reverse proxy server. This is typically done for
a number of reasons:

protection: the topology of the server, the database server
can be hidden from the front end

caching: The proxy server take away load from the backend
system through caching

flexibility: the topology behind the reverse proxy can be
changed more easily

First, this trick works quite well, but only if your like clauses
only ever use the wildcard on the right hand side (or not at
all). MySQL will not be able to use the index if the like
contains a wildcard on the left.

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